Alrigt now, seriously. Will the HD overcool the motor, when I am idling around town or whatnot? Seems lots of people are doing the normal one, and only a handful are doing the heavy duty one. So, will it cool the motor too much when Im not going fast, or low rpms?
I know it sounds dumb, but will it, with my 160 degree thermostat, and the fans programed to come on early?

 

No. T-stat determines the cooling. HD water pump is more of a longer life electric motor than a drastically incresed amount of water flow.
Steve...

 

no, minimum temp is controlled by the thermostat, not waterpump

 

Some say that "to cold" hurts performance. Personally i think the colder the better just as long as ur fuel is atomizing. I have an electric waterpump, and a 160 Tstat. The only problems i get is start up is kinda choppy but it goes away, although i have problems with my setup elsewhere. Definite power gains in one though, the colder the motor the better but hey i could be wrong.

 

The thermostat will open wider the hotter the engine gets, regulating the engine temperature. So the hotter the coolant is, the more of the hot coolant flows into the radiator, and the more of the cool coolant replaces it.

 

The HD one actually flows alot more coolant then the normal one, that is why I asked. the standard is like 35 gpm, and the HD is 55 gpm. the numbers may be slightly off, but that is the gist of it. That is why I was curious.
Thanks guys!